Paper closure



Wm WM A W 2 Sheets-Sheet 1 G. WAMEW PAPER CLOSURE m ill Original FiledApril ll i918 G. RAMSEY PAPER CLOSURE Original Filed April 11 1918 2Sheets-Sheet 2 FY, UF BRUULYN, NEW YURK, MSSTGNUR T hlll'tl ldi t. l at@LQSURE Tlltlhl', 0F BROOKLYN, NJEW YQR, A CURFQRATIUN 0F "1 Ilul. ll

PAPER CLOSURE.

a lication ma hprll ii, rare, semi n aerate. neaewei Feptember a, rear.derlall an. enema.

To all whom it ma concern:

Be it known t at T, Gnonen AMsEr, a

citizen of the United States, and a resident of the city of Brooklyn, inthe county of liings, State of New York, haveinvented certain new anduseful Tmprovements in Paper Closures, of which the following is aspecification.

This invention relates primarily to clos- 1o ures and more particularlyto a closure made principally from paper-stock.-

The principal object of this invention is the provision of a cheapclosure that can be tightly secured on container mouths of variabledimensions.

A further object of this invention is to provide a closure that may betightly sealed against a substantially straight walled container mouthand wherein the major portion so of the closure is formed of paper stockand the minimum portion of metal.

it still further object of the present invention is the provision of aclosure of the 'side seal ty'pe wherein the closure proper is at formedfrom paper stock and the sealing invention will in part be obvious andwill in til till

till

part be pointed out hereinafter in the specilication by reference to theaccompanying drawings and wherein like parts are represented by likecharacters throughout theseveral figures thereof.

Figure l is asectional view illustrating the cap in position on acontainer neck ready to be sealed.

Figure 2 illustrates the relation of parts after the seal has beencompleted by use of one type of sealing die Figure 3 is a sectional viewof a different typ of seal.

igure' t is a section taken through the middle of the sheet metalreinforcing ring with the paper stock cap removed.

Figure 5 is a perspective view of a com pleted ring with the paper stockremoved.

Figure 6 diagrammatically illustrates a mechanism for spinning orrolling the sheet metal ring in position on the cap.

Figure l' is a view taken on section A-A in Figure 6..

ll-leretofore in the art of closures it has been common practice togather a sheet of paper over the mouth of a container and tie such sheetof paper in position with a string. llt has also been common practice toprovide a paper cap that is tied in position on a bottle neck, forexample a milk bottle, by means of a contracting metal ring.

The first method is usually carried out by hand and in substantially allcases makes an insecure closure that requires considerable time to beroperly positioned and secured in place. 'lFhe second type of closuremore nearly approaches the present invention but in this type of closurethe forces acting to contract the metal tie are restricted to a singlezone and must be so regulated as not to crush the container during thesealing operation, and therefore are liable not to make a fluid tight orhermetic seal. Furthermore, in this type of closure more or lesscomplicated mechanism is necessary for sealing and such seals are notadapted for use against straight walled containers.

The present invention provides a side seal of great strength andsecurity and of such formation and simplicity as to permit the sealingoperation to be accomplished by sealing dies of very simple constructionand in @eneral use in sealing sheet metal closures.

7 y treating the paper stock withsuitable water-proofing materials it ispossible to use the present closure to obtain hermetic seals which maybe largely used to replace sheet metal closures in many classes ofaclrages.

Referring now more particular y to the drawings the major portion of thecap 1 is formed from paper stock either by punching, or punching anddrawing, from suitable sheets of paper, a plain straight walled cap. Agroove or bead 2 is provided in the cylindrical side wall of the papercap 1 and is preferably if-shaped in cross section. The exterior of thisgroove is reinforced by a sheet metal ring or band 4-, the ends of whichare overlapped, as at 5 in Figures t and 5.. This reinforced paper capis adapted to be placed over the mouth o a container of glass,earthenware or other substantially lllli incompressible material. Afterthe cap is placed in position the seal is eifected by squeezing togetheror compressing the upper and lower walls 7 and 8, respectively, of thesheet metal band or ring 4, while constraining the ring and skirtagainst the peripheral wall of the vessel. This action may beaccomplished by uitable sealing dies 9 and 10 that are relativelymovable and provided with properly related sealing faces, as is commonin the art. It will be noted that since the ring 4 cannot expanddiametrically to the full width of the folded portions, the bringingtogether or closing of the upper and lower side walls causes the inneredges of the ring to move inwardly, thereby constituting a tensionmember compressing the paper stock tightly against the outside wall ofthe container 6, and effecting a very tight seal between the side walland the paper cap. The seal formed in this manner is in reality a doubleseal, one complete peripheral sealing zone being formed between theupper wall 7 of the ring and the side of the container, and a separatecomplete peripheral sealing zone being formed between the lower wall 8of the ring and the side of the container. Either of these seals will beeffective in maintaining the container properly closed. Where the papercap is paraflinized or otherwise treated, the water-proofing materialwill be, to a certain extent, forced from .the pores of the cap at thesealing zone and will form a layer of such material between the cap andthe container, thereby further facilitating the hermetic seal. It willbe noted that the sealing zone is relatively wide in that it willinclude substantially the entire area beneath the compressed ring orband 4.

In Figure 3 is illustrated a seal formed by angularly disposed sealingdies. In this type of seal the upper edge or wall 7 of the ring 4 isbent upwardly thereby producing a more acute angle between the bead andthe side wall of the cap, consequently in creasing the radial pressureatthis zone and thereby effecting a slightly wider sealing area than isobtained in the seal illustrated in Figure 2. In this construction thesealing faces on the sealing dies or chucks 11 and 12 are inclined andsubstantially parallel.

Figures 6- and 7 illustrate diagrammatically one form of mechanism forspinning the ring 4 in position upon the cap and this mechanism maycomprise a supply of strip sheet tin 14 that is led over the guide roll15 and through the feeding rolls 16 and 17, past the cutting blades 18and 19 through the guide 20 to the grooved pressure rolls 21 and 22.These pressure rolls are mounted on a suitable spring-pressed saddle andmay be lifted when desired by suitable mechanism (not shown).These-rolls 21 and 22 hear against the bead roll 24 that is mountedwithin a suitable guide 25. Assuming that the pressure rolls 21 and 22have been lifted and that a paper cap 1 has been positioned on the beadroll 24: Now when the feeding rolls 16 and 17 advance the strip of tinfrom the supply 14 through the guide 20 to the pressure roll21, thisstrip of tin will be caught between the pressure rolls and tightlycompressed against the paper cap and continuing the rotation of thevarious rolls will feed the strip of tin around the paper cap and at thesame time bead or groove both the tin and the side wall of the cap. Whena suitable amount of tin has been fed forward to complete the ring thecutters 18 and 19 are very quickly operated to sever the supply and thecomplete cap is then ready to be removed from the device. The severaloperations take place automatically so that the caps are very quicklyand economically formed. Under some certain conditions it is desirableto have intimate contact between the ring 4 and the cap 1 and where thisis desirable an intermediate material, such as resin and tallow or othersuitable adhesive materials, may be utilized for'coating the strip oftin on the side which contacts with the paper cap so that during thebeading operations sufficient heat will be developed to cause the ringto stick to the side walls of the cap.

The present invention contemplates a cap the major portion of which maybe formed of some inexpensive flexible material sueh as paper, thenecessary rigidity for effecting a permanent seal being contributed by areinforcing member of flexible material having a greater stability thanthe inexpensive material, so as to act, when applied to the container,as a tension member cfiom tive to retain the flexible material of thecap under compression against the container wall. This provides a capboth economical in manufacture and in application, and wherein no metalis in contact with the contents of the container, and also wherein -aneffective liquid and hermetic seal is established.

Having thus described my invention what -I claim is: l

1. A closure of the character specified comprising a cap of paper andthe like having a top portion and a depending skirt, a bead in the saidskirt with the concave portion of the head on the interior of the skirt,and the convex portion of the bead en theexterior of the skirt, and areinforcing band covering said head, said band being formed of materialhaving greater stability than the material in the ca and adapted whencompressed to cause sai bend to be collapsedand to produce an inwardradial movement of portions of the skirt whereby said cap may be sealedagainst a substantially aaaaaa incompressible side wall of a suitablecontainer. 5 i v Q. A closure of the character specified comprising acap of paper or the like and having a cover portion and a skirtdepending from said cover portion, said cap being treated withwaterproofing-material to substantially fill the pores thereof, a beadin the skirt of said cap with the concave portion of said bead on theinterior of said skirt and the convex portion of the bead on theexterior of said skirt, and a reinforcin band overlying said head, saidband being formed of material having greater stability than the capmaterial so as to maintain the latter in position and expresswaterproofing material from portions thereof.

3. In a closure of the character specified,

. a cap of paper and the like having a cover portion and a skirtdepending-from said cover portion, an annular bead in said skirt, areinforcing metallic means on the exterior of said skirt andconstructedto collapse the said bead when the side walls of said meansare collapsed whereby said means is capable of retaining the said beadAll All

llll ltd in conformity with the contour of the said means.

A. A container comprisinga receptacle having substantiallyincompressible side walls adjacent the mouth thereof, a closure in theform of a cap of paper or the like and having a cover portion, and askirt portion, a sealing bead in said skirt comprisin a portion of saidskirt folded upon itsel and retaining means for preventing the unfoldingof the folded portion and to maintain the skirt adjacent the foldedportion under radial pressure and in close contact with the side wallsof the container adjacent the mouth thereof.

5. A package comprising a container, a paper cap having a cover portionand a skirt depending over the side .walls of the said container, a beadin said skirt, and.

reinforcing means substantially ll-shaped in cross-section andmaintaining the skirt adj acent said bead in close engagement with theside walls of" the container to form a hermetic seal between the sidewalls of the container and the said skirt.

b. A device of the character specified comprising a paper cap having acover portion and a skirt depending from said cover portion, a beadformed in said skirt and an open band over said head whereby said bandmay be deformed to deform said bead and thereby effect a seal betweensaid skirt and the side walls of a suitable container.

7. A closure comprising a cap portion of flexible material shaped toprovide a top and an annular skirt, and a tensioning member of flexiblematerial having greater stability than the material of the capencompassing the skirt portion; the tensioning member and skirt beingformed with registering beads protruding convexly on their peripheries,for the purpose described.

8. A package comprising a container having a side wall, a cap offlexible material having a cover portion forming a closure for thecontainer and an annular skirt encompassing the side wall, and aconstricting member of ductile material having greater stability thanthe material of the skirt encompassing the skirt portion; saidconstricting member having parts deformed to maintain portions of theskirt compressed against the side wall in separate peripheral sealingzones.

9. A package comprising a container having a side wall, a cap having acover closing the mouth of the container and a skirt portionencompassing a portion of the side wall; said skirt portion beingdeformed to provide a plurality of separate and independent hermeticseals between the skirt portion and the side wall of the container.

10. A closure for packing vessels comprising a cover for closing themouth of the vessel, a ductile portion arranged to encircle the sidewall of the vessel, and a flexible portion arranged to encircle the sidewall of the vessel, the ductile portion being deformed upon the flexibleportion to press parts thereof against the vessel wall to provide aplurality of separate peripheral hermetic seals thereon.

11. A closure cap having an integral paper cover portion and a dependingskirt, a supporting member over the sealing portion of said skirt, saidskirt having a groove adapted to be deformed to bring the side walls ofthe groove together and shorten the skirt whereby a portion of the skirtof the cap may be squeezed against the side of a suitable container andtightly supported thereon to form a side seal. p

12. A closure cap having a paper cover portion and a skirt dependingfrom the cover portion, said skirt being provided with a groove which isadapted to be deformed to decrease in diameter when verticallycompressed and to form a friction side seal with the side wall of asuitable container, and means to hold said skirt in the deformed shape.

13. As an article of manufacture, a closure caphaving a cover portionand a skirt portion of compressible paper stock or the like, and aconstricting band encircling said skirt portion and being provided withan open groove adapted to be deformed to squeeze the skirt of the capagainst the side wall of a suitable container and form a side seal.

' GJEURGE RAMSEY.

All

ltd

